Elevator



(No Model.)

W. STEVENS.

ELEVATOR.

No. 330,750. Patented Nov l 7, 1885.

UNITED STATES PATENT OFFICE.

WVILLIAM STEVENS, OF PHILADELPHIA, PENNSYLVANIA.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 330,750, dated November 1'7, 1885.

Application filed September 18, 1885. Serial No. 177,437. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM STEVENS, of the city and county of Philadelphia, and State of Pennsylvania, have invented an Improvement in Elevators, of which the following is a specification.

My invention has reference to elevators, but more specifically to an improvement upon the means for automatically opening and closing the hatchways upon the ascent or descent of the cage; and it consists in certainimprovements upon Letters Patent granted to me August 6, 1878, No. 206,842, which is fully set forth in the following specification and shown in the accompanying drawings, which form part thereof. In said Letters Patent the hatchdoor-operating lever had its two arms made adjustable by a bent bar or bolt, which in practicejwas found to be weak in construction, as the sudden descent of the cage in time caused the bolt to become bent, changing the relative angles of the arms and preventing the doors being opened at the proper time, and also endangering their not being opened sufficiently wide to allow the passage of the cage.

The object of my present invention is to improve the said construction and greatly strengthen the said levers without rendering them more complicated. My object is also to provide a suitable spring attachment to said levers by which, in the rapid ascent of the cage, the levers follow up close against the same and insure a positive and easy closing of the hatch-doors.

In the drawings, Figure 1 is a sectional elevation of a hatchway embodying my improvements, and Fig. 2 is a perspective view ofthe operating-levers. v

A indicates the elevator-guides, andB-is the hatch-way. O are the hatch-doors. Eare the levers, connecting with thehatch-doors by links N, by which they are opened by the descending cage, which levers are connected to the guide-posts A or other framing of the elevator through the agency of brackets D. These levers E consist of.a hub-section, F, having the bearing f and a pin, 0, and secured to this hub-section are two links, H, and two arms, I, the former of which may swing upon their pivot h, while the latter are made rigid between lugs 73, though in practice either may be made to swing, as desired. Riveted between the arms H is the curved guide-plate G, pivoted to the end ofwhich are the links K, united to bar J by bolts M, which pass through a slot, L, in said bar J, which is hinged at one end between the arms I. By this construction it is seen that by loosening the bolts M the arms I and H, and consequently the cam guide-plate G, may be relatively adjusted, so that the latter may be acted on sooner or later by the elevator-cage and the proper opening of the hatch-door accurately insured. The pin 0 on the hub F is connected to a spring, Q, and so located that when the hatch-doors are fully raised it is under tension, and, upon the upward passage of the cage, insures the doors positively closing, and the guide-plate G, following the roller on the bottom of the cage, preventing any falling of the doors and also insures their working uniformly and smoothly. The arms H may be made of wrought-iron bars and the plate G of cast metal. The bracing, as shown, being triangular, offers the greatest resistance and flexure or bending. Therefore, while I prefer the construction shown, I do not limit myself to the details, as they may be modified without departing from my invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is'

1. The combination of the cage with the hatch-door and a pivoted guide-lever, consisting of two arms adjustably hinged together, one of which has a cam. or curved plate secured thereto, and which can be replaced when worn, and the other of which is connected to the hatch-door, and which levers are united by an adjustable connection, substantially as and for the purpose specified.

2. The combination of the cage, the hatchdoor, and the bell-crank lever, one arm of which is provided with replaceable cam-piece adapted to be depressed by the, descending cage, and the other arm of which is connected to the hatchway-door and a straight connection between said arms, bywhich they are made adjustable, which straight connection consists of two bars, one of which carries bolts and the other of which is provided with a slotted end, through which the bolts pass, substantially as and for the purpose specified.

3. A lever for a hatch-door-operating device, which consists of the hub F, arms H and trap-door and bell-crank lever, the arms of which are adjustable in respect to each other, I 5 and one of which is adapted to be acted on by the cage, link N, connecting the door with one arm of the bell-crank, and spring Q, arranged substantially as shown.

In testimony of which invention I hereunto 20 set my hand. 1

WILLIAM STEVENS.

Witnesses:

R. M. HUNTER, ANDREW ZANE, J r. 

